Worcester 27i System Compact Installation, Commissioning And Servicing Instructions page 45

SUMP SEAL
1. Place seal on sump interface.
2. Be sure the ear lugs of the seal are mounted on the lugs of the sump.
Before placing the flue pipe.
▶ Be sure the seal is clean and free of debris.
Fig. 91 Sump seal
Never place the seal in the flueway before assembly of
the flueway.
Place seal always on sump interface.
COMBUSTION AIR INLET AND GAS PIPE DISCONNECTION
1. Rotate the combustion air inlet pipe anti-clockwise to release from the
fan assembly and pull away from the fan.
2. Undo the top gas pipe connector at the gas valve.
2.
Fig. 92 Combustion air inlet pipe removal
FAN REMOVAL
The boiler case is shown removed to aid clarity.
3. Rotate the exhaust pipe to the left to gain access to the fan assembly
securing screws.
4. Support the weight of the fan and remove the two screws securing the
fan.
Greenstar i System Compact - 6 720 807 726 (2013/05)
1.
2.
1.
3.
Fig. 93 Fan removal 1
5. Rotate the exhaust pipe back to the right.
6. Pull the fan assembly away from the mount, lift and rotate the fan
towards you. Ensure that the front of the fan clears the left hand front
castellated nut securing the burner housing.
7. Pull the gas pipe off the fan body connection, the pipe is secured by
the interference fit between the pipe and connector.
When refitting the rubber gas pipe, ensure that the pipe
is correctly oriented by aligning the notch in the pipe
with the lug on the fan connector. Do not kink the pipe.
There is a raised arrow on the pipe indicating the location
of the notch.
6.
Fig. 94 Fan removal 2
SERVICE AND SPARES
4.
5.
7.
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